When little rivulets of running water gather together and cut small channels in the soil, the process is called as?
Rill erosion
Understanding Soil Erosion Processes
Soil erosion is a natural process involving the detachment and transportation of soil particles by agents like water, wind, or ice. When water flows over the land surface, it can collect and concentrate, leading to different forms of water erosion depending on the volume and speed of the flow.
Identifying Rill Erosion
The question describes a specific scenario: "little rivulets of running water gather together and cut small channels in the soil". This description directly matches the definition of Rill erosion.
- Rivulets: These are small streams or channels. When these small streams form on a slope due to concentrated surface runoff, they gain enough energy to detach and transport soil particles.
- Small Channels: The action of these concentrated rivulets cutting into the soil surface creates distinct, but small, channels. These channels are typically shallow enough to be removed by normal tillage operations.
This process of forming small, finger-like channels is characteristic of Rill erosion.
Comparing with Other Erosion Types
Let's look at why the other options don't fit the description:
- Sheet erosion: This is the uniform removal of soil in thin layers over a broad area, rather than cutting distinct channels. It happens before the water concentrates into rivulets.
- Gully erosion: This occurs when Rills consolidate and enlarge, cutting much deeper and wider channels than Rills. Gully channels are too large to be removed by normal tillage.
- Channel erosion: This is a very general term that could apply to erosion within any channel, including streams, rivers, or irrigation ditches. While Rill and Gully erosion *are* types of channel erosion, the question specifies the *process* of *small* channels being cut by *little rivulets*, which points specifically to Rill erosion.
Based on the specific description of small channels being cut by gathering rivulets, Rill erosion is the correct process.
| Erosion Type | Description | Characteristic Feature |
|---|---|---|
| Sheet erosion | Uniform removal of soil in thin layers. | No distinct channels visible. |
| Rill erosion | Concentrated flow cuts small, temporary channels (rivulets). | Small, finger-like channels, removable by tillage. |
| Gully erosion | Rills deepen and widen into large, permanent channels. | Large, deep channels, not removable by tillage. |
Revision Table: Soil Erosion Concepts
| Term | Key Aspect | Relationship |
|---|---|---|
| Water Erosion | Erosion caused by flowing water. | Broad category including Sheet, Rill, and Gully erosion. |
| Sheet Erosion | Initial stage of water erosion. | Uniform removal of soil surface. |
| Rill Erosion | Intermediate stage, post-sheet erosion. | Formation of small channels by concentrated flow. |
| Gully Erosion | Advanced stage, post-rill erosion. | Formation of large, deep channels. |
Additional Information: Impact of Rill Erosion
Rill erosion is a significant form of soil degradation. While the channels themselves are small, they can remove a substantial amount of topsoil over time. This leads to reduced soil fertility, decreased water infiltration, and increased sediment runoff into waterways. Understanding and controlling Rill erosion is crucial for soil conservation and preventing more severe Gully erosion.
Factors influencing Rill erosion include rainfall intensity, slope gradient, soil type, and vegetation cover. Steeper slopes, intense rainfall, easily erodible soils, and lack of vegetative cover all contribute to increased Rill formation.
Important Questions from People
Given below are two statements :
Statement I: Michael Polanyi, a physical chemist and philosopher of science, has argued that our explicit knowing depends on a vast subterranean layer of tacit human knowing.
Statement II: According to Polanyi, "If we did not have bodies and selves" we could not know any of what we know at an articulate conceptual, logical, empirical level".
In the light of the above statements, choose the most appropriate answer from the options given below :
Given below are two statements :
Statement I : Interrogative education begins with the premise that we are embedded in a communal reality.
Statement II : We cannot know this communal reality truly and well unless we ourselves are consciously and actively in community with it as knowers.
In the light of the above statements, choose the most appropriate answer from the options given below :
Match List I with List II
List I (Pollution Source)
List II (Category)
A.
Sewage
I.
Thermal Pollution
B.
Agriculture fertilizers
II.
Sediments
C.
Land Erosion
III.
Oxygen demanding waste
D.
Power Plants
IV.
Plants Nutrients
Choose the correct answer from the options given below:Through enrichment process, concentration of which uranium isotope is increased in the natural uranium?
Who among the following thinkers observed that light and heat are only different forms of the same essential substance and also speaks of gravity as the cause of falling?
